Find all the numbers under the coloured fields and complete the square. The sums of digits in each row and colon are equal to a specific number displayed on the screen. Put the mouse over a field, read the clue which appears below the magic square, click end key your digit. If you do not understand a given clue search for information in the Math section of the website. The sums in rows and colons are equal to a specific number shown on the screen.
If your digit is correct it remains in the field and you get one reward point.
If your digit is wrong it is erased an you lose one point. Your score is displayed on the screen accordingly to your performance. When the square is completed the game is over which is announced by the trumpet.
There is a hidden rule related to the use of colours to be discovered by you in order to get better results
Good luck!